As controversial as Robert Moses' automobile-heavy redesign of New York City was, none of his projects matched the sheer insanity of this skyscraper-sized highway proposed by one-time NYC health commissioner Dr. John A. Harriss in 1930.

To be fair, this concept art from Modern Mechanics magazine isn't the most ridiculous club sandwich-style motorway ever proposed. That honor would likely go to Dr. T. Kenard Thomson's triple-decker airplane-rail-highway that he wanted to build on Staten Island in the early 1900s.